Sectional grinding wheel



SECTIONAL GRINDING WHEEL Filed Au 51,, 1925 6 23 V IN VENTQRS l 24 Papal.MBrancles and W 7o/zn Wfldarrqs I ATTORNEYS BY I 5 11 1. 7 1 WMV UNITESTAL ES Patented Sept. 6, 1927.

PAUL'HERMAN Bminnns AND JoHNw. ADAMS, or Bninor'nron'r, CONNECTICUT,.AS-

SIGNORS TO THE sPRiNo-rrnitn ure. oo

PonA'rIoN or, CONNECTICUT.

V E- T OF'F C L or. :snrncnronr, connnc'rrcnr A consno'rioNA GRINDINGWHEEL."

- Application filed August 31, 1325i Serial 1 To."53,6 16.

, This invention relates to newand useful improvements in abrading orgrinding machinery and has particular reference to sectional grindingwheels.

novel chuck means for adjustingthe abrasive element or elements of asectional grinding wheel to'bring the active face of faces.

thereof into a new position or positions as it or'they become worn, suchadjusting means operating ina positive manner 'and'in the case of agrinding wheel utilizing a plurality of abrasive elements, being suchthat the elementmay be adjusted independently of each other to keeptheir active faces in alignment as they become worn or broken. 7

Another object is to provide an improved clamping jaw for the abrasiveelement together with means .for securing 1t 1n the grinding wheel in amanner, to prevent breakage of the grinding element, such aw, mountingthe means for adjusting the grind ing element. I i

Additional objects and advantages will become apparent from aconsideration of the following specification taken in connection withthe accompanying drawings wherein r Fig. 1 is aview vpartly in sectionand partly in elevation showing my improved grinding wheel, some of theabrasive elements being omitted; V

Fig. 2 is an enlarged sectional viewalong the line 2-2 of Fig. 1; and IFig. 3 is a perspective view ofthe abrasive element alone.

1 Referring indetail' to thezdrawing the numeral 5 indicates the wheelin its entirety, the same comprising a disc portion 6 together with ahub 7 andan outer rim or.

flange 8 which is arranged at anangle to the disc or'body portion 6. vAnannular extension 9is secured to flange 8. Extension 9. is substantiallyL-shaped in cross section and has its wall 10 fitted into a cutoutportion screws 12;0r other suitable fasteningmeans.

An object of the invention is to provide a I 11 of flange 8 and issecured to the flange by ing members 15 for securing a likenumber ofsimllarly spaced abrasive or grinding elements 16. Since each of thesejaws and its associated parts are of exactly the same construction adetailed description of one will sufiice for all.- I Y 7 Abrasiveblocks'or elements 16 are adapted to be clamped against the innerperiphery of the outer flange 13. To this end the,

grinding elements have their two outer hearing portions 17 curved to thesame degree of curvature as that of the inner periphery of flange 18 .sothat they'snugly engage the same at these points when in position in thewheel, while the more central surface is straight thus free fromengagement. Y

- The jaw 15 (Fig; 2)- is positioned inwardly of the elements 16 andisheld in place by means of a screw 25 and the stop 18 cooperating with acoil spring 19 and a pin 20 about which the spring is positioned.

Spring 19 expands against the rearward portion of jaw 15 in a manner to.tend'to shove it forward andparticularly to hold element 16 in positionwhile beingadjusted and clamped. When the element 1.6 becomes shortenedand is moved outwardly by adjustment of screw 29,the stop 18 becomesengaged byv the part 21. and forms a stop therefor in a manner toutilize the pressure of the screw 25 against the point ,a of block 16and of the part 21 against, stop 18 and when the element 16 has beenmoved out-' wardly the forward end of the jaw 15, being provided with apart or extension22'extending; in the same direction, as does part 21,forms the bearing portion of the jaw. This stop 18 also servestoprevent'the jaw from J falling out of place when element 16 is removedfor replacement or the like. The x forward end of the jaw 15 is providedwith apart or extension 22 extending in the same direction as does part21 and forming {the bearing portion of. thejaw.

That portion of the jaw betweenpar-ts21 and. 22 is hollowed out as at23and part 22 extends. below the walls 24 of said hollowed out portionand isthe only part of the jaw' which contacts with the element 16. Aninspection of Fig. 2 will show thatthe jaw 15 is arranged at an inclinewithin channel '14, the part 21 being lowest and the jaw inclin- Kingtoward-the front or contacting part v22. v

The pressure is applied to the grinding elescrew is manipulated wherebyto maintain ried by said jaw, and a follower operated by the active faceof the element beyond the said screw for adjusting said element formouthof the channel. wardly to maintain its active face beyond 8. In agrinding wheel having a pair of the mouth of the channel.

5 spaced flanges forming a channel, a jaw in Signed at Bridgeport, inthe county of 15 said channel for clamping a grinding ele- Fairfield andState of Connecticut, this 29th ment therein, a stop in said channel forholdday of August, A. D. 1925. ing the jaw therein when the element isremoved therefrom, a spring normally urging PAUL HERMAN BRANDES.

said jaw toward said stop, a feed screw car- JOHN W. ADAMS.

